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mm: setup_per_zone_inactive_ratio - do not call for int_sqrt if not needed 

int_sqrt() returns 0 if its argument is zero so call it if only needed.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cyrill Gorcunov 2009-06-16 15:32:32 -07:00 committed by Linus Torvalds
parent af166777cf
commit 5c87eada68
1 changed files with 3 additions and 2 deletions
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3
mm/page_alloc.c
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@ -4471,8 +4471,9 @@ static void setup_per_zone_inactive_ratio(void)
/* Zone size in gigabytes */ /* Zone size in gigabytes */
gb = zone->present_pages >> (30 - PAGE_SHIFT); gb = zone->present_pages >> (30 - PAGE_SHIFT);
if (gb)
ratio = int_sqrt(10 * gb); ratio = int_sqrt(10 * gb);
if (!ratio) else
ratio = 1; ratio = 1;
zone->inactive_ratio = ratio; zone->inactive_ratio = ratio;